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How to Disable ipv6 in ubuntu 9.04

Hi
I have tried to disable the ipv6 support in ubuntu 9.04 32bit but the /etc/modprobe.d/aliases does not exist so I can't disable the suport as sugested for the previews versions. I need to disable it becouse it is pounding a total maihem in my vamware machines.

So if enyone knows the solution .. pleas help!

Thanks :D

Edit /etc/modprobe.d/blacklist and add a line:

Code:

blacklist ipv6

Then restart network, or reboot you machine.

ipv6Moved2Kernel

as i google, sorted up that they have been moved ipv6 module away, and puted it in kernel as default enable.
but i don't know how can we tell kernel , not to load ipv6 at boot time...
some one told that with should use KernelCommandLine! but how?
*** maybe he was talking about GRUB prompt which can pass flags to kernel, befor boot processing.

If the ipv6 functionality is built-in the kernel, you need to use sysctl to adjust various ipv6 kernel parameters.
Searching a little, revealed this post, but as you can see it's most likely not working.
Maybe worth trying also to put the following in /etc/sysctl.conf and reboot your box:

Code:

net.ipv6.conf.all.dad_transmits=0

net.ipv6.conf.all.autoconf=0

net.ipv6.conf.all.accept_redirects=0

net.ipv6.conf.all.accept_ra=0

net.ipv6.conf.all.forwarding=0

net.ipv6.conf.all.router_solicitations=0

um... tested it.. i am sorry, but IPV6 is still up (after reboot)

Code:

shayne@shayne-Desktop:~$ cat /etc/sysctl.conf 

#

# /etc/sysctl.conf - Configuration file for setting system variables

# See /etc/sysctl.d/ for additional system variables.

# See sysctl.conf (5) for information.

#



#kernel.domainname = example.com



# Uncomment the following to stop low-level messages on console

#kernel.printk = 4 4 1 7



##############################################################3

# Functions previously found in netbase

#



# Uncomment the next two lines to enable Spoof protection (reverse-path filter)

# Turn on Source Address Verification in all interfaces to

# prevent some spoofing attacks

#net.ipv4.conf.default.rp_filter=1

#net.ipv4.conf.all.rp_filter=1



# Uncomment the next line to enable TCP/IP SYN cookies

# This disables TCP Window Scaling (http://lkml.org/lkml/2008/2/5/167),

# and is not recommended.

#net.ipv4.tcp_syncookies=1



# Uncomment the next line to enable packet forwarding for IPv4

#net.ipv4.ip_forward=1



# Uncomment the next line to enable packet forwarding for IPv6

#net.ipv6.conf.all.forwarding=1





###################################################################

# Additional settings - these settings can improve the network

# security of the host and prevent against some network attacks

# including spoofing attacks and man in the middle attacks through

# redirection. Some network environments, however, require that these

# settings are disabled so review and enable them as needed.

#

# Ignore ICMP broadcasts

#net.ipv4.icmp_echo_ignore_broadcasts = 1

#

# Ignore bogus ICMP errors

#net.ipv4.icmp_ignore_bogus_error_responses = 1

# 

# Do not accept ICMP redirects (prevent MITM attacks)

#net.ipv4.conf.all.accept_redirects = 0

#net.ipv6.conf.all.accept_redirects = 0

# _or_

# Accept ICMP redirects only for gateways listed in our default

# gateway list (enabled by default)

# net.ipv4.conf.all.secure_redirects = 1

#

# Do not send ICMP redirects (we are not a router)

#net.ipv4.conf.all.send_redirects = 0

#

# Do not accept IP source route packets (we are not a router)

#net.ipv4.conf.all.accept_source_route = 0

#net.ipv6.conf.all.accept_source_route = 0

#

# Log Martian Packets

#net.ipv4.conf.all.log_martians = 1

#

# The contents of /proc/<pid>/maps and smaps files are only visible to 

# readers that are allowed to ptrace() the process

# kernel.maps_protect = 1



net.ipv6.conf.all.dad_transmits=0

net.ipv6.conf.all.autoconf=0

net.ipv6.conf.all.accept_redirects=0

net.ipv6.conf.all.accept_ra=0

net.ipv6.conf.all.forwarding=0

net.ipv6.conf.all.router_solicitations=0

shayne@shayne-Desktop:~$ ifconfig | grep inet

          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0

          inet6 addr: fe80::217:31ff:feca:4fda/64 Scope:Link

          inet addr:127.0.0.1  Mask:255.0.0.0

          inet6 addr: ::1/128 Scope:Host

shayne@shayne-Desktop:~$

I changed my /etc/rc.local It turns off ipv6

Code:

#!/bin/sh -e

#

# rc.local

#

# This script is executed at the end of each multiuser runlevel.

# Make sure that the script will "exit 0" on success or any other

# value on error.

#

# In order to enable or disable this script just change the execution

# bits.

#

# By default this script does nothing.



IFACE='eth0'

IPV6=`ifconfig $IFACE | gawk '/inet6/ {print $3}'`

ifconfig $IFACE inet6 del $IPV6



exit 0

After making the above changes should i restart the system

Hi,

Try this.

Quote:

sudo vi /boot/grub/menu.lst

search for

Quote:

# defoptions=quiet splash

should be somewhere at line nunber 85

replace with this

Quote:

# defoptions=quiet splash ipv6.disable=1

save and quit the file

run

Quote:

sudo update-grub

Quote:

reboot

Quote:

ip a | grep inet6

there should be no output